Speaker
Description
Understanding the internal radioactive background contributions in its 20-kiloton liquid scintillator (LS) target is essential for the success of the JUNO reactor neutrino experiment. OSIRIS is a 20-ton radiopurity detector at the end of JUNO’s LS purification chain screening 1/10 of the LS during the filling of JUNO and verifying that the radiopurity requirements are met. After the filling and combined with the existing extensive LS purification infrastructure, OSIRIS will serve as an excellent testbench for different kinds of LS studies and especially in the development of JUNO’s future physics program. So far considered scenarios vary from long term LS stability or double beta decay isotope loading tests to standalone precision measurement of the solar pp neutrino flux. To maximize the outcome of such measurements, cost-efficient improvements of the OSIRIS detector are required. For example, to improve the light collection uniformity, the cylindrical photodetector configuration will be changed to a spherical one. Improvement in light collection is achieved by assembling light concentrator cones and adding extra PMTs. Addition of external shielding will help to suppress the external gamma ray background in the central volume of the detector. This work discusses more in detail the foreseen improvements and physics cases of OSIRIS upgrade.
| Submitted on behalf of a Collaboration? | Yes |
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